JP5774343B2 - Input device and parameter setting method - Google Patents

Description

  The present invention relates to an input device and a parameter setting method, and more particularly to a technique for recognizing a handwritten line figure (stroke) and setting a parameter.

  Some portable terminals having a touchpad have a function of rotating, enlarging or reducing a figure or a screen. These are provided, for example, by the following method.

  The first conventional example is a method of providing a right rotation or left rotation icon and tapping the icon to rotate the screen with the center of the information display area as the center of rotation. Similarly, for enlargement / reduction, an enlargement / reduction icon is provided, and tapping the icon enlarges / reduces the screen with the center of the information display area as the center of enlargement / reduction.

  The second conventional example is a method of using multi-touch to touch the screen with two fingers and rotating the screen in accordance with a gesture for rotating the two fingers. In this case, the center point of the two fingers first brought into contact with the digitizer surface is the center of rotation. This method is described as “multi-finger twist gesture” with reference to Patent Document 1, for example.

  When enlarging / reducing using multi-touch, multi-touch is performed with two fingers, and enlarging / reducing is performed by increasing or decreasing the distance between the two fingers. Even in this case, the center point of the two fingers first brought into contact with the digitizer surface is the center of rotation.

JP 2011-023004 A Japanese Patent No. 3585357 Japanese Patent No. 2778439

  In the first conventional example, two icons of enlargement / reduction (or right rotation and left rotation) are often used, and the icons occupy a small mobile terminal screen, and the information display area becomes narrow. In addition, since the center of enlargement / reduction (or rotation) cannot be specified at the same time, the number of operation procedures increases. Also, it is difficult to specify the speed of enlargement / reduction (or rotation). In particular, when enlarging / reducing (or rotating) data is read from the server by communication, unnecessary data is communicated, and operability is lowered.

  When the enlargement / reduction (or rotation) is expressed by a slide bar type widget, a display area is required as compared with the icon type. Also, if the display area is small, fine adjustment of enlargement / reduction (or rotation) becomes difficult.

  In the case of providing a screen rotation or enlargement / reduction function with a simple gesture instead of a method that requires the user to perform a multi-step operation as in the first method of the conventional example, the following points are problems. Become. The second method of the conventional example is that it is necessary to detect two points pointed to the digitizer surface. Since it is necessary to detect two points, it cannot be used for a gesture that can be used for detecting a point of a stylus pen instead of a finger or even a pressure-sensitive touch panel that is cheaper than an electrostatic induction type. In other words, it cannot be used for single point gestures.

  Patent Document 2 is a prior art that performs screen movement and enlargement / reduction with a single point gesture. Referring to paragraph 0061 and the like, there is a description that the center coordinates are known from the coordinates of the three points of the arc. However, this method is vulnerable to noise. It is known that coordinates (characteristic points) detected by a digitizer are often shifted due to noise inside and outside the apparatus (such as electromagnetic waves emitted from an LCD). In addition, a human handwritten locus may generate random noise due to camera shake or the like.

  On the other hand, in Patent Document 3, an input line figure is converted into a sequence of point data, a feature point is calculated from the arrangement of the point data, and each point data sandwiched between two feature points is the first feature. The angle ("separation elevation angle") formed by the line connecting the point data from the point and the line connecting the second feature point from the point data is taken, and the point data considered as noise is excluded by statistical processing. .

  In view of the above-described problems, the operation of drawing a substantially arc-shaped stroke with a single touch using a touchpad or the like (hereinafter referred to as “stroke gesture”) can be used to rotate and enlarge / reduce a figure or screen (display area). provide. At this time, the rotation and enlargement / reduction of the figure and the display area can be realized if the direction and amount of the parameters of the rotation operation and the enlargement / reduction operation can be specified by the stroke gesture. The direction and the amount are clockwise or counterclockwise, or the direction and the rotation angle, ie, enlargement or reduction, or the enlargement ratio (or reduction ratio) is Say how much, how much.

  The present invention has been made in view of the above circumstances, and has a direction and an amount based on an input of an operation of drawing a substantially arc-shaped stroke with a single touch using a touchpad or the like (“stroke gesture”). It is an object of the present invention to provide an input device and a parameter setting method capable of outputting the parameters.

In order to achieve the above object, as a first aspect of the present invention, an arc recognition means for recognizing whether or not a line figure input in a predetermined unit time is an arc and an arc is recognized. In this case, the rotation direction extracting means for extracting the rotation direction of the line figure, and when the line figure is recognized, a value corresponding to the angular velocity of the line figure is extracted based on the recognized central angle of the arc. An angular velocity extraction means, a parameter setting means for setting parameters according to the extracted rotation direction and a value corresponding to the extracted angular velocity, and a recognized arc when it is recognized as an arc Radius extraction means for extracting the radius of the parameter, wherein the parameter setting means sets a parameter according to the rotation direction, a value corresponding to the angular velocity, and the extracted radius, and the predetermined unit The time Wherein the determined based on the processing time of the subsequent processing means for processing using a parameter set by said parameter setting means, there is provided an input device.
Further, as a second aspect, an arc recognizing means for recognizing whether or not the line figure input in a predetermined unit time is an arc, and when the line figure is recognized as an arc, the rotation direction of the line figure is changed. A rotating direction extracting means for extracting, an angular velocity extracting means for extracting a value corresponding to an angular velocity of the line figure based on a recognized central angle of the arc when the arc is recognized, and the extracted rotation Parameter setting means for setting a parameter according to a direction and a value corresponding to the extracted angular velocity, and the predetermined unit time is processed using the parameter set by the parameter setting means. It is an object of the present invention to provide an input device characterized in that it is determined based on the processing time of the subsequent processing means.

Further, as a third aspect, an arc recognition step for recognizing whether or not a line figure input in a predetermined unit time is an arc, and when the line figure is recognized as an arc, the rotation direction of the line figure is changed. A rotation direction extracting step for extracting, an angular velocity extracting step for extracting a value corresponding to an angular velocity of the line figure based on the recognized central angle of the arc when the arc is recognized, and the extracted rotation A parameter setting step for setting parameters according to the direction and a value corresponding to the extracted angular velocity, and a radius extraction step for extracting the radius of the recognized arc when it is recognized as an arc; comprises, in the parameter setting step, the rotation direction, the value corresponding to the angular velocity, and, depending on the extracted said radius, and setting the parameters, the predetermined unit time, in the parameter setting step Wherein the determined based on the processing time of the subsequent treatment step of the process of using a constant parameter, there is provided a parameter setting method.
Further, as a fourth aspect, an arc recognition step for recognizing whether or not a line figure input in a predetermined unit time is an arc, and when the line figure is recognized as an arc, the rotation direction of the line figure is changed. A rotation direction extracting step for extracting, an angular velocity extracting step for extracting a value corresponding to an angular velocity of the line figure based on the recognized central angle of the arc when the arc is recognized, and the extracted rotation A parameter setting step for setting a parameter according to a direction and a value corresponding to the extracted angular velocity, and the predetermined unit time uses the parameter set in the parameter setting step. The present invention provides a parameter setting method characterized in that the parameter setting method is determined based on a processing time of a subsequent processing step.

  According to the present invention, it is possible to output a parameter having a direction and an amount based on an input of an operation of drawing a substantially arc-shaped stroke with a single touch using a touch pad or the like (“stroke gesture”). .

It is a block diagram which shows the function structure of the 1st Embodiment of this invention. It is a figure which shows an example of the user's stroke gesture input into 1st Embodiment. It is a figure which shows an example of the sampling coordinate sequence of 1st Embodiment. It is a figure which shows the separation elevation angle formed by the both ends of the sampling coordinate sequence of 1st Embodiment, and the remaining sampling coordinates. It is a graph for demonstrating the circular arc recognition method in 1st Embodiment. It is a conceptual diagram (the 1) for demonstrating the relationship between the angular velocity in 1st Embodiment, and the parameter after conversion. It is a conceptual diagram (the 2) for demonstrating the relationship between the angular velocity in 1st Embodiment, and the parameter after conversion. It is a flowchart which shows the flow of a process of 1st Embodiment. It is a figure which shows an example of the stroke gesture at the time of carrying out the fine adjustment of the quantity of a parameter in 1st Embodiment. It is a figure which shows two strokes contained in the stroke gesture of FIG. It is a block diagram which shows the function structure of the 2nd Embodiment of this invention. It is a conceptual diagram for demonstrating the radius r of the recognized circular arc used in 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail.

(First embodiment)
FIG. 1 shows a functional configuration of the present embodiment. Each means shown in FIG. 1 is configured by controlling a computer or a portable terminal with a software program unless otherwise specified.

  As shown in FIG. 1, the input device 1 according to the present embodiment includes a stroke input unit 101, a stroke sampling unit 102, an arc recognition unit 103, a rotation direction extraction unit 104, an angular velocity extraction unit 105, a parameter conversion unit 106, Enlarging / reducing means (or rotating means) 107 is provided.

  The stroke input unit 101 is a unit for inputting a user operation on the input device 1 to the input device 1. It is assumed that the user's operation includes an operation (“stroke gesture”) in which a circle is drawn around the fingertip as shown in FIG. The locus of user operation is called a stroke.

  The stroke input means 101 may be anything as long as it can input an operation that draws a circle, such as a touch panel of a smartphone or a touch pad of a notebook computer. The stroke may be drawn in real time by a display means (not shown).

  The stroke sampling unit 102 has a function of sampling coordinates included in the stroke input by the stroke input unit 101. These sampled coordinates are called sampling coordinates. As a result of the processing of the stroke sampling means 102, the stroke as shown in FIG. 2 is represented in a sampling coordinate string as shown in FIG.

  The arc recognizing means 103 strokes during a predetermined unit time dt, and recognizes that the stroke is an arc based on the sampled sampling coordinate sequence. If it cannot be recognized as an arc, it is not considered because it deviates from the gist of the present embodiment. The method described in Patent Document 3 is used for recognizing that it is an arc.

  First, it is divided into both ends of a coordinate sequence sampled during a predetermined unit time dt and the remaining sampling coordinate set φ. In FIG. 3, when the coordinate sequence from the end point A to the end point B is sampled during the unit time dt, the sampling coordinate sequence is divided into a sampling coordinate set φ sandwiched between the end points A and B and the remaining end points A and B. .

  Next, all angles (hereinafter referred to as “separation elevation angles”) θ formed by both ends and the remaining sampling coordinates (∈φ) are obtained (FIG. 4). As shown in FIG. 4, the separation elevation angle θ is an angle formed by a line segment connecting one of both ends and the remaining sampling coordinate (∈φ) and a line segment connecting the remaining sampling coordinate (∈φ) and the other of the both ends. It is. When the sampling coordinate sequence is an arc, the separation elevation angle θ is a circumferential angle.

  Therefore, as shown in FIG. 5, even if an accurate circle cannot be drawn due to a user's camera shake or the like, a substantially constant value is shown. For each elevation angle, burst noise with a low occurrence frequency may be removed by obtaining the variance and the maximum frequency. If the difference between the maximum value and the minimum value of the separation elevation angle after removing the burst noise is equal to or less than a predetermined threshold value, it is recognized as an arc. In this way, the arc recognition means 103 recognizes that the sampling coordinate sequence is an arc.

  The rotation direction extraction unit 104 extracts the rotation direction of the stroke recognized as an arc. Either the clockwise direction or the counterclockwise direction (clockwise or counterclockwise) is extracted.

  The angular velocity extraction means 105 extracts the angular velocity of the stroke recognized as an arc. Since the stroke is a stroke input during the unit time dt, the angular velocity is uniquely obtained from the calculated separation elevation angle θ (since the circumferential angle is half the center angle of the arc stroke). In other words, in the present embodiment, since circular arc recognition is performed at regular intervals, the angular velocity is obtained from the separation elevation angle θ.

  The subsequent parameter conversion means 106 converts the angular velocity into the parameter amount, in other words, the parameter amount is set according to the angular velocity. Therefore, the angular velocity extraction means 105 does not need to strictly calculate the angular velocity (rad / second), and may extract a value corresponding to the angular velocity that has a one-to-one correspondence with the angular velocity.

  The parameter conversion means 106 converts the rotation direction extracted by the rotation direction extraction means 104 and the angular velocity extracted by the angular velocity extraction means 105 into parameters used for subsequent processing. The subsequent processing is processing executed by the enlargement / reduction unit (or rotation unit) 107.

  When the subsequent processing is enlargement / reduction of a graphic or display area, the parameter conversion unit 106 assigns, for example, clockwise rotation to enlargement and counterclockwise rotation to reduction. Then, an enlargement rate (or reduction rate) is determined based on the extracted angular velocity. The same applies to the rotation of a figure or display area.

  The angular velocity and the converted parameter need not be in a proportional relationship. Preferably, as shown in FIG. 6, it is preferable that the converted parameters gradually change in accordance with the increase or decrease of the angular velocity. In the case shown in FIG. 6 (a), for example, the parameter is a screen enlargement ratio, and when the circle is slowly stroked, the fine enlargement is continued, and when the circle is quickly drawn on the digitizer surface, the enlargement is abrupt. Parameter conversion is performed.

  2. Description of the Related Art Conventionally, a technique is known that detects the acceleration when a mouse device of a personal computer is moved, and increases the amount of movement of the pointer when the acceleration exceeding a certain threshold is detected. With this technology, when the mouse device is moved quickly above a certain speed, the pointer follows and moves quickly. In this case, as shown in FIG. 7A, the movement amount added to the normal movement amount is configured to increase when the acceleration exceeds a certain threshold value. However, the movement amount added is discontinuous as illustrated. Even if it is a correlation like FIG.7 (b), it is the same that there exists a discontinuous point.

  Compared with the correlation as shown in FIG. 7, it is closer to the human sense that the change in the parameter is gradual with respect to the change in the extracted angular velocity, as shown in FIG. There is an effect that the result desired by the operating user is appropriately output.

FIG. 8 shows a processing flow of the present embodiment.
As described above, when the user makes a stroke gesture such that the digitizer surface such as a touchpad is swung around with a single touch using a fingertip, the stroke input means 101 inputs the stroke to the input device 1. The stroke sampling means 102 samples the coordinates included in the stroke (step S101).

  The arc recognizing means 103 divides the sampling coordinate sequence into both ends and the remaining sampling coordinate set φ, and obtains all angles (“separation elevation angles”) formed by both ends and the remaining sampling coordinates (∈φ) (step S102).

  After performing statistical processing such as removing an abnormal value with respect to the obtained separation elevation angle (step S103), the circular arc recognition means 103 determines whether or not the separation elevation angle is within a certain range, as shown in FIG. (Step S104), if it is within the range, it is recognized as an arc (Step S105).

  The rotation direction extraction unit 104 extracts the rotation direction of the stroke recognized as an arc (step S106).

  The angular velocity extraction means 105 extracts the angular velocity from the separation elevation angle obtained in step S102 and the time (step S107). Note that the calculation of time can be omitted by periodically executing circular arc recognition at regular intervals.

  The subsequent parameter conversion means 106 converts the angular velocity into the parameter amount, in other words, the parameter amount is set according to the angular velocity. Therefore, the angular velocity extraction means 105 does not need to strictly calculate the angular velocity (rad / second), and may extract a value corresponding to the angular velocity that has a one-to-one correspondence with the angular velocity.

  Next, the parameter conversion means 106 converts the rotation direction extracted in step S106 into the converted parameter direction (positive / negative, clockwise or counterclockwise, enlargement or reduction, etc.), and extracted in step S107. The angular velocity is converted into the converted parameter amount (rotation angle, enlargement ratio, reduction ratio, etc.) (step S108).

  The parameter conversion means 106 outputs the parameter converted by the above-described process from the user's stroke gesture to the subsequent processing block (step S109).

  The series of processing flow shown in FIG. 8 may be executed every predetermined unit time dt. The predetermined unit time dt may be determined based on the processing time of the subsequent processing unit that performs processing using the parameter output from the parameter conversion unit 106. The subsequent processing means is not particularly limited, but in this embodiment, in addition to the enlargement / reduction means (or rotation means) 107, a means for drawing an enlarged / reduced (or rotated) figure or display area is also included.

  With the configuration and operation described above, the present embodiment is a parameter having a direction and an amount based on an input of an operation of drawing a substantially arc-shaped stroke with a single touch using a touchpad or the like (“stroke gesture”). Can be output.

  In the present embodiment, the angular velocity of the stroke gesture is used as means for specifying the parameter amount. Therefore, it is easy to finely adjust the amount. In addition, an intuitive operation feeling can be provided.

  As an example, in a case where the screen is rotated by the touch panel of the mobile terminal, the user expresses the rotation by an intuitive gesture of drawing a circle on the screen of the touch panel. At this time, the rotation direction can be expressed as a direction of drawing a circle. The rotation speed can be expressed by the moving speed of a finger drawing a circle.

  As another example, in the case of enlarging / reducing graphics, the user expresses enlarging / reducing by an intuitive gesture of drawing a circle on the screen of the touch panel. At this time, enlargement and reduction can be expressed in the direction of drawing a circle. The speed of enlargement and reduction can be expressed by the moving speed of a finger drawing a circle.

FIG. 9 shows an example of a stroke gesture when finely adjusting the parameter amount.
FIG. 9 shows an example in which a counterclockwise stroke gesture G2 after a clockwise stroke gesture G1 is input to the input device 1 of the present embodiment. When the clockwise rotation is assigned to the enlargement of the figure, it corresponds to the case where fine adjustment is performed by reverse rotation because the enlargement is excessive.

  In such a case, since the end points are different even when the separation elevation angle θ is the same, the rotation direction extraction means 104 can appropriately determine whether the rotation direction is clockwise or counterclockwise (see FIG. 10). ).

(Second Embodiment)
FIG. 11 shows a functional configuration of the present embodiment.
In the present embodiment, the radius extraction means 108 in FIG. 11 calculates the radius r of the recognized arc, and passes the calculated radius r to the parameter conversion means 106. The parameter conversion means 106 converts the radius r into a parameter and outputs it. As shown in FIG. 12, the center coordinates of the approximate circle are specified by the two end points used by the arc recognition means 103 when recognizing the arc and the separation elevation angle θ (or the circumferential angle when the arc is an arc). Therefore, the radius r can also be specified.

  By reflecting the radius r in the parameter, the user can express the parameter amount different from the parameter amount expressed by the circumferential angle in the first embodiment according to the size of the circle. If the binary value expressed by the rotation direction is “first parameter” and the parameter amount expressed by the circumference angle is “second parameter”, the parameter amount expressed by the size of the circle is “third parameter”. May be called "parameters".

  As an example, in the case of rotating the screen with the touch panel of the mobile terminal, the second parameter, that is, the size of the circle, the reflection speed of the rotation (how far the intermediate drawing is skipped), and other change parameters ( For example, it is possible to express an instruction of a rotating object, such as an object included in a circle area being a rotation operation target).

  As another example, in the case where the figure is enlarged / reduced, the second parameter, that is, the size of the circle, the reflection speed of the enlargement / reduction (how far the intermediate drawing is skipped), and other change parameters (for example, (Z-axis direction enlargement / reduction, etc.) can be expressed.

  The meanings given to the rotation direction of the stroke gesture, the moving speed of the point where the gesture points, and the size of the circle described above are merely examples, and other meanings and combinations may be used.

DESCRIPTION OF SYMBOLS 1 Input device 101 Stroke input means 102 Stroke sampling means 103 Arc recognition means 104 Rotation direction extraction means 105 Angular velocity extraction means 106 Parameter conversion means 107 Enlargement / reduction means (or rotation means)
108 Radius extraction means

Claims (5)

Arc recognition means for recognizing whether or not the line figure input in a predetermined unit time is an arc;
A rotation direction extracting means for extracting a rotation direction of the line figure when it is recognized as an arc;
Angular velocity extraction means for extracting a value corresponding to the angular velocity of the line figure based on the recognized central angle of the arc when it is recognized as an arc;
Parameter setting means for setting a parameter in accordance with the extracted rotation direction and a value corresponding to the extracted angular velocity;
A radius extracting means for extracting the radius of the recognized arc when it is recognized as an arc;
With
The parameter setting means sets parameters according to the rotation direction, a value corresponding to the angular velocity, and the extracted radius ,
The input apparatus according to claim 1, wherein the predetermined unit time is determined based on a processing time of a subsequent processing unit that performs processing using the parameter set by the parameter setting unit . Arc recognition means for recognizing whether or not the line figure input in a predetermined unit time is an arc;
A rotation direction extracting means for extracting a rotation direction of the line figure when it is recognized as an arc;
Angular velocity extraction means for extracting a value corresponding to the angular velocity of the line figure based on the recognized central angle of the arc when it is recognized as an arc;
Parameter setting means for setting a parameter in accordance with the extracted rotation direction and a value corresponding to the extracted angular velocity;
With
The input apparatus according to claim 1, wherein the predetermined unit time is determined based on a processing time of a subsequent processing unit that performs processing using the parameter set by the parameter setting unit. The parameter setting means sets a parameter amount to be set according to a value corresponding to the angular velocity, and sets whether the parameter amount to be set is positive or negative according to the rotation direction. The input device according to claim 1 , wherein the input device is characterized. An arc recognition process for recognizing whether or not the line figure input in a predetermined unit time is an arc;
A rotation direction extracting step of extracting a rotation direction of the line figure when it is recognized as an arc;
An angular velocity extraction step of extracting a value corresponding to the angular velocity of the line figure based on the central angle of the recognized arc when it is recognized as an arc;
A parameter setting step for setting a parameter according to the extracted rotation direction and a value corresponding to the extracted angular velocity;
A radius extraction step of extracting the radius of the recognized arc when it is recognized as an arc;
Including
In the parameter setting step, parameters are set according to the rotation direction, a value corresponding to the angular velocity, and the extracted radius ,
The parameter setting method, wherein the predetermined unit time is determined based on a processing time of a subsequent processing step in which processing using the parameter set in the parameter setting step is performed . An arc recognition process for recognizing whether or not the line figure input in a predetermined unit time is an arc;
A rotation direction extracting step of extracting a rotation direction of the line figure when it is recognized as an arc;
An angular velocity extraction step of extracting a value corresponding to the angular velocity of the line figure based on the central angle of the recognized arc when it is recognized as an arc;
A parameter setting step for setting a parameter according to the extracted rotation direction and a value corresponding to the extracted angular velocity;
Including
The parameter setting method, wherein the predetermined unit time is determined based on a processing time of a subsequent processing step in which processing using the parameter set in the parameter setting step is performed.

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